function y = himmelbh(x)
% HIMMELBH function
% x0=1.5*ones(n,1)
n=length(x); y=0; 
m=n/2;
 for i=1:m
     y=y+(-3*x(2*i-1)-2*x(2*i)+2+(x(2*i-1))^3+(x(2*i))^2);
 end


